I did a lot of experimental sound in the nineties and early 2000's. Some women who I had recording voice samples were over 10 feet away from my subs and experienced good vibrations. I also learned that differing frequencies would focus on the chestal region as well as the crotchal.
With my sound experiments I could vibrate specific stuff in my house off the walls, make objects walk across surfaces and even create wind patterns that could sway objects like loose posters on the walls.
I've got video of it in a storage facility, I should probably dig it up and post it on the Internet tubes. It was shot on miniDV with a Canon XL1, so I'm going to have to buy something that reads those old MiniDV cassettes.